<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>大数据热点图</title>
    <style>
        body{
            background-color: #333;
        }

        .map{
            position: relative;
            width: 747px;
            height: 616px;
            margin: 0 auto;
            background:url(./media/map.png) no-repeat;
        }

        .city{
            position:absolute;
            top: 229px;
            right: 192px;
        }

        .tb{
            /* 这里必须用top和right,如果用bottom和left,因为要覆盖上面的.city,如果用bottom,因为.city中使用了top,就会优先使用top */
            top: 500px;
            right: 84px;
        }

        .gz{
            top: 543px;
            right: 195px;
        }

        .dotted{
            width: 8px;
            height: 8px;
            background-color: #09f;
            border-radius: 50%;
        }

        .city div[class^="pulse"]{
            /* 保证我们小波纹在父盒子里面水平垂直居中 放大之后就会中心向四周发散 */
            position:absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%,-50%);
            width: 8px;
            height: 8px;
            border-radius: 50%;
            box-shadow:0 0 12px #009dfd;
            animation: pulse 1.2s linear infinite;
        }

        .city div.pulse2{
            animation-delay: .4s;
        }

        .city div.pulse3{
            animation-delay: .8s;
        }

        @keyframes pulse {
            0% {}
            70% {
                /* transform: scale(5);  我们不要用scale 因为他会让 阴影变大*/
                width: 40px;
                height: 40px;
                opacity: 1;
            }
            100% {
                width: 70px;
                height: 70px;
                opacity: 0;
            }
        }
    </style>
</head>
<body>
    <div class="map" >
        <div class="city">
            <div class="dotted"></div>
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div>
        <div class="city tb">
            <div class="dotted"></div>
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div>

        <div class="city gz">
            <div class="dotted"></div>
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div>
    </div>
</body>
</html>